Using GG to move an edge doesn't yield expected results
As @Dontwalk pointed out: 


  You had a face with three vertices and another face with five vertices. You changed the mesh so the faces all had four vertices which plays best with loop cuts and other tools in Blender. 


I had a face overlapping another face and this cause my loop cut to not go all the through my model. Once i removed the extra face and redid my loop cut the problem was fixed.